1. Alfvèn, H. (1983). On hierarchical cosmology astrophysics. Astrophysics and Space Science 89, 313–324.
2. Alfvèn, H. (1986). Model of the plasma universe. IEEE Transactions on Plasma Science 14, 629–638.
3. Arcidiacono, G. (1985). Gli universi ipersferici, il gruppo conforme e il campo gravitazionale di newton. Collectanea Mathematica 36, 119–135.
4. Arcidiacono, G. and Capelas de Oliveira, E. (1996). Conformal Relativity and d’Alembert Equation, Tepper L. Gill, eds. In: New Frontiers in Relativities, Hadronic Press, pp. 297–302.
5. Arcidiacono, G. (2000). La Teoria Degli Universi, Volume II, Di Renzo Editore, Roma.